Samsung Galaxy J7 vs Samsung Galaxy A21s Specs Comparison

Design

Dimensions
6.00 x 3.09 x 0.30 inches 152.4 x 78.6 x 7.5 mm	6.44 x 2.96 x 0.35 inches 163.7 x 75.3 x 8.9 mm
Weight
6.03 oz (171.0 g)	6.77 oz (192.0 g)
Biometrics
	2D Face unlock, Fingerprint (touch)
Features
Touch sensitive control keys
Keys
Left: Volume control; Right: Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
Black, Gold, White	Black, White, Blue, Red

Display

Size
5.5-inch	6.5-inch
Resolution
1280x720px, 267 PPI	1600x720px, 20:9 ratio, 270 PPI
Technology
Super AMOLED	TFT
Screen-to-body
69.72 %	82.94 %
Colors
16 777 216
Features
Ambient light sensor, Proximity sensor	Proximity sensor

Hardware

System chip
Qualcomm Snapdragon 615 8939	Samsung Exynos 850
Processor
Octa-core 1500 MHz ARM Cortex-A53	Octa-core 8x 2.0GHz Cortex-A55
GPU
Adreno 405	Mali-G76
RAM
1.5GB (LPDDR3)	3GB (LPDDR4)
Internal storage
16GB, available to use: 11.6 GB	32GB (eMMC 5.1), available to use: 19.5 GB
Storage expansion
microSDXC up to 128 GB	microSDXC up to 512 GB
OS
Android (6.0 Marshmallow, 5.1 Lollipop)	Android (10), Samsung One UI

Battery

Capacity
3000 mAh	5000 mAh
Type
	Li - Polymer
Charging
	Fast charging

PhoneArena Battery Tests

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Battery Life Estimate

Untested

Browsing

Untested

Video

11h 9min

Gaming

7h 48min

Learn more on our PhoneArena Battery Test Results page

Camera

Rear
Single camera	Quad camera
Main camera
13 MP (Autofocus) Aperture size: F1.9 Focal length: 28 mm	48 MP (PDAF) Aperture size: F2.0 Focal length: 26 mm Sensor size: 1/2" Pixel size: 0.8 μm
Second camera
	8 MP (Ultra-wide) Aperture size: F2.2 Sensor size: 1/4" Pixel size: 1.12 μm
Third camera
	2 MP (Macro) Aperture size: F2.4
Fourth camera
	2 MP (Depth information) Aperture size: F2.4
Flash
LED	LED
Video recording
1920x1080 (Full HD) (30 fps) Video calling	1920x1080 (Full HD) (30 fps)
Front
5 MP (Flash)	13 MP, Video capture: 1920x1080 (Full HD)

Connectivity & Features

Bluetooth
4.1	5.0
WLAN
802.11 b,g,n Hotspot, Wi-Fi Direct	802.11 a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot
USB
microUSB, USB 2.0	Type-C, USB 2.0
Location
GPS, A-GPS, Glonass	GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Hall (for flip covers)	Accelerometer, Gyroscope
Other
ANT+	NFC

Multimedia

Headphones
3.5mm jack	3.5mm jack
Speakers
Earpiece, Loudspeaker	Earpiece, Loudspeaker
Features
Album art cover, Background playback
Screen mirroring
Wireless screen share	Wireless screen share
Radio
FM, RDS

Cellular

4G (FDD)
Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)	Bands 1(2100), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD), 28(700 APT)
4G (TDD)
Bands 40(2300)	Bands 38(2600), 40(2300), 41(2600+)
3G
Bands 5(850), 8(900), 2(1900), 1(2100)	Bands 1(2100), 2(1900), 5(850), 8(900)
Data Speed
LTE, HSPA	LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
Dual SIM
Yes	Yes
SIM type
Micro SIM	Nano SIM

Phone Features

Notifications
Haptic feedback, Music ringtones (MP3), Polyphonic ringtones, Vibration, Flight mode, Silent mode, Speakerphone
Other features
Voice dialing, Voice commands, Voice recording

Buyers information

MSRP
$ 234	€ 240

Availability

Officially announced
Jul 16, 2015	May 15, 2020

Alternative variants

RAM	2GB
4G (FDD)	Bands 12(700 a), 5(850), 26(850+), 4(AWS-1), 2(1900), 25(1900+)
4G (TDD)	Bands 41(2600+)
3G	Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)

with 4GB RAM

RAM	4GB
Internal storage	64GB

RAM	2GB
OS	Android (7.1 Nougat)
4G (FDD)	Bands 2(1900), 4(AWS-1), 5(850), 12(700 a)
3G	Bands 5(850), 4(1700/2100), 2(1900), 1(2100)

with 6GB RAM

RAM	6GB
Internal storage	64GB

Links

Full specifications
Samsung Galaxy J7 Specs	Samsung Galaxy A21s Specs
PhoneArena Review
	Samsung Galaxy A21s Review
User Reviews
Samsung Galaxy J7 User Reviews